Packing mold



I l l L H. C. MACK PACKING MOLD Filed March 24, 1939 I I l\ll I Hum 326W R F 21 Oct. 31, 1939.

HIM a V/r/ Patented Oct, 31, 1939 UNITED STATES PATENT oFFlcr.

2,178,209 PACKING MOLD Harry G. Mack, St. Paul, Minn, assignor ofonehalf to Frank C. Wiegand, St. Paul, Minn.

Application March 24, 1939, Serial No. 263,877

3 Claims. (01. 22-152) My invention relates to molds for casting softtions 7L and IL' on one casting operation and metal p n us a y ofmaterials known as red in one piece such as designated 1A in Fig 6, saidmetal and Comprising a copp oyue packtwo sections subsequently mountedon a mandrel ings are used on p p e s d reciprocating and separated andformed to size by any suitable rods and shafts of innumerable purposesand cutting tool. 5 Well known i t engineering fi d- The p In makingcastings of the material used in ings made with this device are of thetype with packings it h h th t been a problem to a b e eorrespendl'ng 0the e O a shaft 011 pose of or reduce certain gases generated duringwhich it is to be used, av a straight body the casting process and thisis one condition I 0 portion from whence it tapers down to'a diha eprovided for, m p f r bly slightly larger than he bore, This moldcomprises an upright cylindrical two he p k n comprising two registeringhalv part mold preferably two identical half cylin- With alcllate ee gfaces tapering down to a del's of which one designated IZR is the rearhalf Str t ed o gitudinal of the bore and sa d and 12F the front half ofthe complete cylinder,

two edges being at diametrically opposite s d s their registering facesdesignated 53. The bore 15 of the be c- D On se R k i prO- of said moldis straight but its exterior may be vided by any Well known meansengaging t flared downward slightly to an enlarged circular larger d Ofthe packing and bearing toward base flange i4. l5is a metal cylinderclosing ring the smaller end the meta be g wedged or forced adapted tohe slipped downwardly over and about 20, inwardly into propercircumferential contact of th tw abutting cti n nd force th t go theshaft. gether. This ring has an aperture ll arranged This dev ce sdesigned pertielllerly produce to be aligned with an aperture It incylinder part s peekings in t emeient manner and elirnil 2F, and i8 is acap screw inserted inwardly into hating Obstacles and certaindl'fiiculties e t and through said alined apertures and its threadp sein Casting, all as hereinafter fully ed inner end engages in a threadedradial bore 25 scribed reference be g held to the accompanying I93 is anupright circular core member ii) in drawing, in which, the center of themold.

- l is a n V Of y Casting devicee$- This core comprises the interiormember of the sembled and e y for pellring of metal andFig mold and isheld in concentric spaced relation I0. 2 is a front elevation of Fig. l.to the inner face of section IZF by m ans of an 80 Fig. 3 is adiametrical sectional elevation as on upright spacer 2G with an arcuateinner fage MBA line 33 in g- Comprising mainly an interior and issuitably fixed to the core. The outer face View of the rear half of them d. of said spacer has two adjoining arcuate faces of Fi 4 end 5 arerespectively a 1 and Side which the right hand part designated 26B is ofI5. elevation of a fin shed metal packing of the kind a diametercorresponding to the inner diameter 85 produced by y mold. of sectionIZF and to the left thereof an arcuate Fi 6 s a front v w f a casting ofthe p face 2220 extends upwardly and inwardly to the made in the mold.core 19. In the rear cylinder part NR approxi- Fig. s e reduced-Scale DView Of my meld mately directly rearward of spacer 20 is fixed in 0 e,omitting the outer ring and Showing the part I2R another spacer 2| witha short arcuate partsfseparatiedth d b f face 21A contacting the coreand from thence R e 0 e mWlng Y Te erence rearwardly this spacer istapered in an are outmerals, tlike 13 3 3 f Z g g wardly toward the leftand terminating at the 111% 1 S in 6 Various mews 1 inside wall of I2Rat a point designated 22. This 5 tg the g ii 22 point (or vertical line)22 in part I23. is diametrigif l g l in g l wi a s t r a igr l t ci rzular looc l y part Cally 013.130 Site from Point 23 in cylincter i [2F 8from whence it is tapered as 9 to the opposite y l latter pomt marksvertlczal lme 3 end Concentric of the bore The packing the inside Wallwhere the arcuate rage til starts.

0 Comprises two Opposite halves designated 7L and The nner arcuate faceof spacer .i which ex- TR said halves having diametrically opposite andtends to point 22 designated Facgs m and registering meeting faces 5 Ieach an arcuate face, 290 form the Opposlte end faces of castmg madeeach half thus having a crescent-like shape. by pouring molten metalinto the mold at y The mold itself is illustrated in Figs. 1, 2, 3, openp e to the l f the core, such p e 5 and '7 and is designed to producetwo packing secing designated by a dotted circle 25 in Fig. l.

A designates the space filled by molten packing metal, the general shapeof the resultant casting being a crescent as seen from the top end.

Any size of metal packing ring of the kind described may thus be cast.The inside diameter of cylinder I2R!2F is the desired outside diameterof packing ring and the core i9 is of a diameter to produce a bore inthe casting of a size according to bore wanted in the cast ring. Theopposite inclined (arcuate) faces of the casting thus made by faces 24and 28C of the mold, form the opposite end faces I l of a packing ringsection.

In the use of my mold a pair of packing sections 9 are cast at one time,in one piece having certain parts readily cut to separate them forfinishing. This is done by providing in each cylinder section IZR andl2F, intermediate its top and bottom ends, an arcuate rib or inwardprojection extending each to the left from the spacer 2| or 20 as thecase may be, this rib in the rear section designated 26R and in thefront section 26F. Each terminates in proximity to the left side meetingfaces l3, and each rib extends in horizontal plane, having an inner face26A concentric of the inner wall of the section and also concentric ofand in spaced relation to core E9. The upper and lower sides 26W of eachrib are flared to the adjacent wall the incline of such flaredetermining the taper 9 of the dual packing casting (see dual castingillustrated in Fig. 6).

In pouring the molten metal a vertical metal rib 21 is made (see Fig. 6)because of the open space between the adjacent ends of the mold ribs26W, said space designated 28 in Fig. 1.

In making a casting the mold is first set on a sandy surface 29, a toppiece comprising in part a disc of plastic or porous material is used tocover the mold and is provided with a passage to pour the molten metalin at 25. The sand or other porous material thus used to close both endsof the mold permits seepage or outlet of gases generated by the pouredmetal and which is an important feature in the process of casting thepacking.

A casting thus made is of the form shown in Fig. 6 having the uprightconnecting web 21 and a semi-circular web 30 formed in the space betweenthe rib faces 26A and the core l9.

Subsequently the casting as shown in Fig. 6 may be mounted on a mandrel3| (shown dotted) corresponding in diameter to the diameter of core [9and recured to the mandrel in any suitable manner. Then put in a latheand cut and turned to finish the angular faces 9, which cuts are madedeep enough to a common central line 32 this finishing cutting apart theupper and lower packing members originally in one casting. Thus isproduced and finished a pair of packing ring members which are notmated, having taper areas 9 in opposite plane. However mated pairs tothese are made by mold means similar to those described but with thespacers 2!, 20 and ribs 26W in diametrically opposite positions to thoseillustrated.

In the use of my mold it is obvious that the device comprises a minimumnumber of parts readily assembled for casting and also readily takenapart or opened after casting. In assembling the cylindrical parts 12Rand IZF are first set up face to face at I3. Then the core member l9-l9Bslipped downwardly into place and which will simultaneously contact theinner face ZIA of the crescent shaped part 2|. The ring I5 is thenslipped downwardly over the cylindrical housing and the screw I8 isinserted radially and drawn up, thus holding the parts firmly together.A dowel 33 is further provided to be inserted radially inwardly throughregistering bores in cylinder [2R block 2! and into core I!) (over ringl5). This provides further stability and connection of parts inconcentric relation.

I claim: g1 I 1. A mold for making soft metal tapered-packings of theclass described, said mold comprising a bisectional upright cylinder, aring member inclosing said cylinder members and holding them firmlytogether in registering positions, a central upright core in saidcylinder, spacer means to removably retain and position said corecentrally in the cylinder, said spacer means comprising a pair ofarcuate blocks one fixed to the interior wall of one cylinder sectionand the other integral of the core, both blocks of a heightcorresponding to the height of the cylinder, each block having a thickend contacting the cylinder wall, each block having further an arcuateface traversing the space between the cylinder wall and the core, saidfaces in diametrically opposite relation to the center of the core, anarcuate rib in horizontal plane and integral of the inner face or wallof the cylinder and intermediate its top and bottom ends, said ribhaving an inner face in vertical plane and in spaced parallel relationto the core and flared thence to the wall of the cylinder.

2. The structure specified in claim 1, in which said cylinder is taperedupwardly, exteriorly, said ring having a correspondingly tapered boreand adapted to be passed down over the cylinder to a predeterminedlevel, said cylinder wall, the ring and the core provided with'radiallyregistering bores, the bore in the core, being threaded, a set screwinsertible in said alined bores and threaded into the core, and a dowelinsertible radially into the cylinder, through a spacer block and intothe core, in spaced relation to said set screw and over the ring member,for the purpose set forth.

3. A packing mold comprising an upright cylindrical body adapted to reston a flat surface of porous material, a central core member within saidcylinder, the open upper end of the'cylinder adapted to be closed by aplate or the like of porous material and provided with a bore for accessto pour molten metal into the cylinder between the core and the wallsthereof, upright spacer blocks between said core and the inside wallsand having'arcuate inwardly exposed faces traversing the space betweenthe core and the inside walls, horizontal rib members integral of thesaid inside walls said ribs flared to the inside walls, said arcuatefaces and the flared ribs pro portioned to produce "of metal poured intothe mold a pair of vertically spaced and connected half-sections ofpacking rings each with a straight, round outer portion and a portiontapered toward its bore formed by the core member of the mold.

HARRY C. MACK.

